The board of education or board of health providing a system of medical and dental inspection of school children, as authorized by section 3313.68 of the Revised Code, shall include in such inspection tests to determine the existence of hearing and visual defects in school children. The methods of making such tests and the testing devices to be used shall be such as are approved by the department of health.

School physicians may make examinations, which shall include tests to determine the existence of hearing defects, and diagnoses of all children referred to them.